the ability to butcher helpless people and cute little animals.
That seems a little lowly for a god to be doing, at least as a specific action. I could see two possibilities: setting animals on fire in public places to mess with a god responsible for animals/a benevolent god responsible for fire, or listing it as a regular activity of your god (the effect being fairly similar to the first). Both would also flavor the opinion people have of you, and could lead to a public conflict between you and any angered gods, which would affect your reputations.
Automate the civilizations etc, and allow the god to issue broad commandments (ie. go burn down / conquer that people or city) which any worshippers follow. Also, miracles and magic of all types must be involved.
In this god game, do gaining followers make you get more power? In that case, having a random generator to let me know how worship work in the world would be very useful.
Also, a list of sects that follow you, and any wars between your sects.
I plan to give Civilizations and various groups within them basic powers of action. Worshipers will come from various groups based on how they feel about you. Your mandates will affect the size and quality of your worshiping population, so the more you demand of them the fewer there will be, but they will also be more devout (and more willing to make sacrifices to you, go on wars, etc.)
Worshipers will have a subtle effect on your importance as a god, but will not make you more powerful. They will be good for amusement, earthly actions such as conflicts and service work, and you can stock your domain with them or the souls of the devout (which may annoy any gods responsible for the afterlife, if present in the pantheon).
Miracles can always be used in major events (or to create major events), but there are two major drawbacks: mortals may come to expect your intervention, and get cocky if you don't, which can damage your image especially if you don't put them in their place, and the more actions you take in a given event, the more likely other gods are to get themselves involved.